Garmin sl 40 installation guide

Note: Unauthorized changes or modifications to the SL40 may void the compliance to required regulatory agencies and authorization for continued equipment usage. The following items are required for the installation: x comm antenna with cables x a microphone x a speaker or headphone These items may be installed dedicated to the SL40 comm or by connections to an audio panel. The standard package includes a mounting frame for ease of mounting, connections, and service of the unit.

Allow an additional one inch clearance to the rear of the mounting frame for connectors and cables. Page Figure 2 Mounting Frame Assembly Figure 2 Mounting Frame Assembly Figure 3 Cable Routing Once the cable assemblies are complete and the connectors are attached to the mounting frame, install the mounting frame assembly in the instrument panel.

Page Electrical Connections A wiring diagram is included as Figure 5. A separate 5 amp maximum circuit breaker or fuse should be installed for downline overload or short circuit protection. Make the power connections to the SL40 using 20 awg wire. This is an optional connection. When making serial connections to the SL40, use a shielded three conductor cable.

Make the RxD, TxD, and ground connections on the 15 pin connector. Interference Check Check the SL40 while operating the other avionics and electrical systems on the aircraft to verify that no significant interference exists, and that the SL40 does not cause significant interference with other systems.

Performance should be checked using low, high, and mid band frequencies. Page 19 4. Press any key to exit the Setup Functions mode. Select an appropriate frequency, key the transmitter, and talk into the microphones to check for the intended operation. Page 20 50 nm while maintaining an appropriate altitude and over all normal flight attitudes. Apollo SL40 Installation Manual Page Section 3 - Specifications Weight with mounting frame Operating temperature Page Receiver Performance Frequency range Page Intercom Performance Transmit key Input pulled low to ground to enable the transmitter Intercom select Page Rear Connector Pinout RS serial data input RS signal ground intercom function select, pulled low to turn on the intercom function speaker and headphone ground connection headphone terminal output microphone input 2 Viewed from rear of unit Apollo SL40 Installation Manual Garmin AT, Inc.

In fact, there are no internal manual adjustments. The antenna should be mounted on a metal surface or a ground plane with a minimum area of 18 x 18 inches. The antenna should be mounted a minimum of 24 inches away from GPS antennas. The comm antenna should also be mounted as far apart as practical from the ELT antenna, preferably one on top and the other on the bottom of the aircraft fuselage.

This can happen when the comm SL40 or any other comm is transmitting on certain frequencies such as The antenna coax cable should be made of RGB or a comparable quality 50 : coax. Assembly instructions for the rear coax connector are included in Figure 4. Download 38 pages , Installation used.

Complete serial interface specifications are included in Appendix E.